All-Optical Measurement Based QIP in Quantum Dots

Details All-Optical Measurement Based QIP in Quantum Dots All-Optical Measurement Based QIP in Quantum Dots

2006-07-04

arxiv.org/abs/quant-ph/0607028v2

Phys. Rev. Lett. 97, 250504 (2006)

Physics

Quantum Physics

4 pages, 3 figures. To be published in PRL

Scientific paper

Parity measurements on qubits can generate the entanglement resource necessary for scalable quantum computation. Here we describe a method for fast optical parity measurements on electron spin qubits within coupled quantum dots. The measurement scheme, which can be realised with existing technology, consists of the optical excitation of excitonic states followed by monitored relaxation. Conditional on the observation of a photon, the system is projected into the odd/even parity subspaces. Our model incorporates all the primary sources of error, including detector inefficiency, effects of spatial separation and non-resonance of the dots, and also unwanted excitations. Through an analytical treatment we establish that the scheme is robust to such effects. Two applications are presented: a realisation of a CNOT gate, and a technique for growing large scale graph states.

Affiliated with

Also associated with

No associations

Rating

All-Optical Measurement Based QIP in Quantum Dots does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with All-Optical Measurement Based QIP in Quantum Dots, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and All-Optical Measurement Based QIP in Quantum Dots will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-239801